Using your Milwaukee 2485-22 M12 FUEL Right Angle Die Grinder is a breeze. First, charge the M12 REDLITHIUM™ 2.0 batteries using the included charger. Once charged, insert the battery into the tool. You can adjust the speed according to your needs using the 4-Mode RPM control and the variable speed trigger. This gives you great control for different tasks. When using the grinder, make sure to wear appropriate safety gear like goggles and gloves. Keep the tool away from water and don't expose it to extreme temperatures. After use, clean the tool with a dry cloth. Store it in the carrying case to protect it from damage. Also, regularly check the accessories for wear and tear and replace them when necessary. This will keep your grinder working well for a long time.